Lower voltages and faster speeds. DDR3 is 1.2-1.65 V while DDR4 is 1.05-1.2 V. DDR3 is 800-2133 MT/s while DDR4 is 2133-4266 MT/s. But like the move from DDR2 to DDR3, DDR4 will have a different pin layout not compatible with current motherboards.

Currently there are only two announced products that will support DDR4: Intel's X99 platform (Haswell-E) and AMD's Opteron A1100 "Seattle" ARM SoC.Reply

Adata been around for a while. They make Solid State Drives and some what been making Memory too. My 2x8GB of 2800MHz function very well with XMP . Default is 2133, select XMP to get 2800, change number value (multiplier) in BIOS from 28 to 30 as to Overclock for 3000MHz without any voltage adjustment. Some people claim they are Crap (not true) as either they do not understand how to use the Adata memory or they are OCing and trying to set for tighter timings which is unnecessary. I guess OverClockers should of bought 3400MHz modules instead of pushing these to past xxxx frequency. Prices on DDR4 are falling rapidly for Dual sets, Quads are overpriced even though matched up to ensure they function well together. But if you obtain a Dual set not working with the set you have ..RMA / return them and try again. For under $160 you can buy 2 sets of 2x8GB as in 32GB rather than spending $300 for Quad 4x8GB modules and have exactly the same performance at half cost. Why pay more just cause they tested in group of 4 rather than a pair. Adata memory is good and they may not be the best. There are no guarantees but same goes in life. If you are on a budget I recommend buying Adata - for people with unlimited Income and wealthy should look else where if you enjoy complaining. Plenty of clearance as not really tall, check out Corsair memory as they make tall memory heat sinks, unless you are planning a very large Liquid Cooling System to rule over the motherboard then buy some small height memory. Maybe all they needed was a larger case "tower". IDK - If they don't work for you then just say so and a brief reason you think they are not. I'm satisfied as the memory is working good in my rig.Reply